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1<?php
2/**
3 * Pop PHP Framework (http://www.popphp.org/)
4 *
5 * @link       https://github.com/popphp/popphp-framework
6 * @author     Nick Sagona, III <dev@nolainteractive.com>
7 * @copyright  Copyright (c) 2009-2024 NOLA Interactive, LLC. (http://www.nolainteractive.com)
8 * @license    http://www.popphp.org/license     New BSD License
9 */
10
11/**
12 * @namespace
13 */
14namespace Pop\Cache\Adapter;
15
16/**
17 * APC cache adapter class
18 *
19 * @category   Pop
20 * @package    Pop\Cache
21 * @author     Nick Sagona, III <dev@nolainteractive.com>
22 * @copyright  Copyright (c) 2009-2024 NOLA Interactive, LLC. (http://www.nolainteractive.com)
23 * @license    http://www.popphp.org/license     New BSD License
24 * @version    4.0.0
25 */
26class Apc extends AbstractAdapter
27{
28
29    /**
30     * Constructor
31     *
32     * Instantiate the APC cache object
33     *
34     * @param  int $ttl
35     * @throws Exception
36     */
37    public function __construct(int $ttl = 0)
38    {
39        parent::__construct($ttl);
40        if (!function_exists('apcu_cache_info')) {
41            throw new Exception('Error: APCu is not available.');
42        }
43    }
44
45    /**
46     * Method to get the current APC info.
47     *
48     * @return array
49     */
50    public function getInfo(): array
51    {
52        return apcu_cache_info();
53    }
54
55    /**
56     * Get the time-to-live for an item in cache
57     *
58     * @param  string $id
59     * @return int
60     */
61    public function getItemTtl(string $id): int
62    {
63        $cacheValue = apcu_fetch($id);
64        $ttl        = 0;
65
66        if ($cacheValue !== false) {
67            $ttl = $cacheValue['ttl'];
68        }
69
70        return $ttl;
71    }
72
73    /**
74     * Save an item to cache
75     *
76     * @param  string $id
77     * @param  mixed  $value
78     * @param  ?int   $ttl
79     * @return Apc
80     */
81    public function saveItem(string $id, mixed $value, ?int $ttl = null): Apc
82    {
83        $cacheValue = [
84            'start' => time(),
85            'ttl'   => ($ttl !== null) ? $ttl : $this->ttl,
86            'value' => $value
87        ];
88
89        apcu_store($id, $cacheValue, $cacheValue['ttl']);
90
91        return $this;
92    }
93
94    /**
95     * Get an item from cache
96     *
97     * @param  string $id
98     * @return mixed
99     */
100    public function getItem(string $id): mixed
101    {
102        $cacheValue = apcu_fetch($id);
103        $value      = false;
104
105        if (($cacheValue !== false) &&
106            (($cacheValue['ttl'] == 0) || ((time() - $cacheValue['start']) <= $cacheValue['ttl']))) {
107            $value = $cacheValue['value'];
108        } else {
109            $this->deleteItem($id);
110        }
111
112        return $value;
113    }
114
115    /**
116     * Determine if the item exist in cache
117     *
118     * @param  string $id
119     * @return bool
120     */
121    public function hasItem(string $id): bool
122    {
123        return ($this->getItem($id) !== false);
124    }
125
126    /**
127     * Delete a value in cache
128     *
129     * @param  string $id
130     * @return Apc
131     */
132    public function deleteItem(string $id): Apc
133    {
134        apcu_delete($id);
135        return $this;
136    }
137
138    /**
139     * Clear all stored values from cache
140     *
141     * @return Apc
142     */
143    public function clear(): Apc
144    {
145        apcu_clear_cache();
146        return $this;
147    }
148
149    /**
150     * Destroy cache resource
151     *
152     * @return Apc
153     */
154    public function destroy(): Apc
155    {
156        $this->clear();
157        return $this;
158    }
159
160}